import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

public class AccessPersonCostructors {
    public static void main(String[] args) {
        try {
            Class clz = Class.forName("reflect.entity.Person");
            Object obj = clz.newInstance();
            System.out.println(obj);

            Constructor c1 = clz.getDeclaredConstructor();
            obj = c1.newInstance();
            System.out.println(obj);

            Constructor c2 = clz.getDeclaredConstructor(String.class);
            c2.setAccessible(true);
            obj = c2.newInstance("new Person");
            System.out.println(obj);

            Constructor c3 = clz.getDeclaredConstructor(String.class,String.class,String.class);
            c3.setAccessible(true);
            obj = c3.newInstance("new Person","beijing","Hello!");
            System.out.println(obj);

        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }
}
